You can certainly "weaponize" Ames, but you can also "weaponize" all other strains of anthrax.
And yes, the FBI has given up. The only folks still searching for the attackers are the USPS Postal Inspectors.
"And yes, the FBI has given up."
For sure? Would make sense. If they solve the case careers and prestige will disappear via the Hatfill law suit. Unsolved, the semblance of "guilt" hangs over Hatfill, FBI careers and prestige preserved.